CVE-2026-46238

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: stop caching unowned originator pointers in BAT IV

BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs.

Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use.

[sven: avoid bonding logic for outgoing OGM]

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8c16c68fdbb69778f8d04f650340c3f4d1518f8e
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/86b2b58d7c228d850c8c78e4144e6123e8ed2718
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/384e3050a42be9085d50507b4d5f8266a588d742
generic

batman-adv: stop caching unowned originator pointers in BAT IV - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620

Vendor Advisories for CVE-2026-46238(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-25ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1061.62~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-25ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-25ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-25ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-25ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.90-1~bpo12+1 (23 versions)6.12.90-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (135 versions)7.0.9-1—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 90× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 294 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-25 04:45 UTCEG score recompute
  11. 2026-08-25 04:45 UTCVendor advisory
  12. 2026-08-25 04:45 UTCGHSA enrichment
  13. 2026-08-23 14:32 UTCEG score recompute
  14. 2026-08-23 14:32 UTCVendor advisory
  15. 2026-08-23 14:31 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-21 23:49 UTCEPSS rescore
  18. 2026-08-21 15:27 UTCEG score recompute
  19. 2026-08-21 15:27 UTCVendor advisory
  20. 2026-08-21 15:27 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 22:31 UTCVendor advisory
  23. 2026-08-20 22:30 UTCGHSA enrichment
  24. 2026-08-20 10:48 UTCEG score recompute
  25. 2026-08-20 10:48 UTCVendor advisory
Show 75 more
  1. 2026-08-20 10:47 UTCGHSA enrichment
  2. 2026-08-19 17:04 UTCEPSS rescore
  3. 2026-08-18 13:48 UTCEPSS rescore
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 08:22 UTCVendor advisory
  6. 2026-08-17 08:22 UTCGHSA enrichment
  7. 2026-08-16 15:10 UTCEG score recompute
  8. 2026-08-16 15:10 UTCVendor advisory
  9. 2026-08-16 15:10 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-16 02:35 UTCEG score recompute
  12. 2026-08-16 02:35 UTCVendor advisory
  13. 2026-08-16 02:35 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 01:30 UTCEPSS rescore
  16. 2026-08-14 23:27 UTCVendor advisory
  17. 2026-08-14 23:27 UTCGHSA enrichment
  18. 2026-08-14 12:16 UTCVendor advisory
  19. 2026-08-14 12:16 UTCGHSA enrichment
  20. 2026-08-14 01:04 UTCEG score recompute
  21. 2026-08-14 01:04 UTCVendor advisory
  22. 2026-08-14 01:04 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 08:10 UTCVendor advisory
  25. 2026-08-13 08:10 UTCGHSA enrichment
  26. 2026-08-12 20:53 UTCEG score recompute
  27. 2026-08-12 20:53 UTCVendor advisory
  28. 2026-08-12 20:53 UTCGHSA enrichment
  29. 2026-08-12 13:51 UTCEPSS rescore
  30. 2026-08-12 09:42 UTCVendor advisory
  31. 2026-08-12 09:42 UTCGHSA enrichment
  32. 2026-08-11 22:30 UTCEG score recompute
  33. 2026-08-11 22:30 UTCVendor advisory
  34. 2026-08-11 22:30 UTCGHSA enrichment
  35. 2026-08-11 11:18 UTCVendor advisory
  36. 2026-08-11 11:18 UTCGHSA enrichment
  37. 2026-08-11 00:06 UTCEG score recompute
  38. 2026-08-11 00:06 UTCVendor advisory
  39. 2026-08-11 00:06 UTCGHSA enrichment
  40. 2026-08-11 00:00 UTCEPSS rescore
  41. 2026-08-10 06:30 UTCVendor advisory
  42. 2026-08-10 06:30 UTCGHSA enrichment
  43. 2026-08-09 19:18 UTCEG score recompute
  44. 2026-08-09 19:18 UTCVendor advisory
  45. 2026-08-09 19:18 UTCGHSA enrichment
  46. 2026-08-09 13:46 UTCEPSS rescore
  47. 2026-08-09 08:07 UTCVendor advisory
  48. 2026-08-09 08:07 UTCGHSA enrichment
  49. 2026-08-08 20:56 UTCEG score recompute
  50. 2026-08-08 20:56 UTCVendor advisory
  51. 2026-08-08 20:56 UTCGHSA enrichment
  52. 2026-08-08 16:37 UTCEPSS rescore
  53. 2026-08-08 09:40 UTCVendor advisory
  54. 2026-08-08 09:40 UTCGHSA enrichment
  55. 2026-08-07 22:29 UTCEG score recompute
  56. 2026-08-07 22:29 UTCVendor advisory
  57. 2026-08-07 22:29 UTCGHSA enrichment
  58. 2026-08-07 11:17 UTCVendor advisory
  59. 2026-08-07 11:17 UTCGHSA enrichment
  60. 2026-08-07 00:06 UTCEG score recompute
  61. 2026-08-07 00:06 UTCVendor advisory
  62. 2026-08-07 00:06 UTCGHSA enrichment
  63. 2026-08-06 13:47 UTCEPSS rescore
  64. 2026-08-06 12:04 UTCVendor advisory
  65. 2026-08-06 12:04 UTCGHSA enrichment
  66. 2026-08-06 00:52 UTCEG score recompute
  67. 2026-08-06 00:52 UTCVendor advisory
  68. 2026-08-06 00:52 UTCGHSA enrichment
  69. 2026-08-05 19:17 UTCEPSS rescore
  70. 2026-08-05 13:40 UTCVendor advisory
  71. 2026-08-05 13:40 UTCGHSA enrichment
  72. 2026-08-04 23:49 UTCEG score recompute
  73. 2026-08-04 23:49 UTCVendor advisory
  74. 2026-08-04 23:48 UTCGHSA enrichment
  75. 2026-08-04 15:10 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-46238?
CVE-2026-46238 is a high vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not…
When was CVE-2026-46238 disclosed?
CVE-2026-46238 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46238 actively exploited?
CVE-2026-46238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.2% of all scored CVEs.
What is the CVSS score of CVE-2026-46238?
CVE-2026-46238 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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